Possibly from distillate from the early 1970's so possibly bottled in the early 1980's. But what we do know that it comes from the period when the distillery was closed, from 1979 through to 1985.
For all my all my dealings with with Springbank, I have yet to try it. But I would hazard a guess that the minimum age of this dram is 12 years.
As to flavour, even in that era when the distillery was going through some hard times, the telltale saltiness and that famous whiff of bonfire smoke would have been there. Along with a hint of sherry oak.